For all of you using FreeBSD and ZFS, Kip Macy (kmacy) and Pawel Jakub Dawidek (pjd) merged ZFS Version 13 into FreeBSD 7-STABLE. Here is a breakdown of some of the new features: kmem now goes up to 512GB so arc is now limited by physmem, the arc now experiences backpressure from the vm (which can be too much - but this allows ZFS to work without any tunables on amd64), L2ARC Level 2 cache for ZFS which allows you to use additional disks for cache, and more.